• Journal of the Korean Institute of Telematics and Electronics
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• v.25 no.2
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• pp.227-232
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• 1988

A semicustom VLSI design fo digital filters used in TDM/FDM transmultiplexer is described. A filter bank composed of only all-pass digital filter sections are implemented with the polyphase network. The use of all-pass filters as basic building blocks is shown to provide a trans-multiplexer structure that has low computational requirements, low quantization noise, and high modularity. The silicon compiler system is used to reduce the design time and to increase the credibility of designed filters. As a prototype, 1st and 2nd order all pass filter are designed, using CMOS N-well double metal technology. The chip sizes of first order filter and the second order filter are 2652 x 533\ulcorner\ulcorner 5334x4300\ulcorner\ulcorner respectively.

• Structural Engineering and Mechanics
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• v.37 no.6
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• pp.685-691
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• 2011

Developing accurate prediction models for deterioration behavior represents a challenging but essential task in comprehensive Infrastructure Management Systems. The challenge may be a result of the lack of historical data, impact of unforeseen parameters, and/or the past repair/maintenance practices. These realities contribute heavily to the noticeable variability in deterioration behavior even among similar components. This paper introduces a novel approach to predict the deterioration of any infrastructure component. The approach is general as it fits any component, however the prediction is custom for a specific item to consider the inherent impacts of expected and unexpected parameters that affect its unique deterioration behavior.

• Journal of Institute of Control, Robotics and Systems
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• v.17 no.3
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• pp.254-257
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• 2011

This study was performed to development a dental three-dimensional laser scanning system and measure the accuracy of new adjustable lower dental impression trays. Multiple impressions of a resin master model were made with custom, stock and new adjustable trays and vinyl polysiloxane impression material. The lower master model and resulting cast were compared using an dental scanning system. Each 3D image was superimposed onto the lower master model image and analyzed with custom software. Multiple measurements of the lower master model and casts were analyzed to determine the accuracy of tray types.

• Journal of the Korean Society of Costume
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• v.5
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• pp.197-206
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• 1981

This study focuses upon the custom of the headgear as a part of historical research on our traditional student uniform. It covers from Sam Kuk period(三國鼎立時代) of which we have found written records of formal education through the period under Japanese colonialism: The followings briefly summerizes the results of this study; 1) The educational civilization. The formalism of national education had been similar to that of China. It's main contents consisted of Chinese literature and practice of confucianism. It's objectives had been the education of selected men of ability, most of whom were the offspring of the high class. The education contents after the civilizational period had been gradually modernized for the purpose of westernization. 2) The changes of students' headgear. They had worn the Nakwon of Julpoong style (折風形羅冠) in the Sam Kuk period. They had worn Bok-Doo in the unified Silla dynasty, and Sadaimoolla-Kun (四帶文羅巾), Pyungjung-Kun (平頂巾) and Pyungjung-Dookun (平頂頭巾) in Koryo dynasty. They had worn Yoo-Kun (儒巾), Bok-Kun (福巾) in Yi dynasty. The noticeable distinction under Japanese colonialism had been the custom uniformity from headgear to footwear. Middle school educatee had worn round cap and professional school and college educatees had worn square hats.

• Journal of Yeungnam Medical Science
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• v.8 no.1
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• pp.206-214
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• 1991

We treated three cases of bone tumors-giant cell tumor, chondroblastoma and malignant fibrous histiocy toma-with a custom-made prosthetic replacement. The patients were followed from 10 months to 18 months, postoperatively. The results of these study are as follows : 1. satisfactory anatomic restoration 2. early ambulation 3. good function 4. biomechanically sound reconstruction.

• Journal of the Korean Home Economics Association
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• v.36 no.7
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• pp.13-24
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• 1998

An analysis of the changing trends of kyongjobi expenditure pattern from 1982 to 1996 and the related factors of kyongjobi expenditure of urban household in 1996 has been performed. Major findings were as follow: An average monthly expenditure was 20,036 won during the period, and the increased rate of monthly expenditure was 5.6 times in the past 15 years which was the twice as much as of the total consumption. The ratio of the total kyongjobi consumption was increased about 2 times during the period, and it was 2.96% in 1996. During the period, an average marginal consumption propensity was 0.0379, and it was dramatically increased from '93 to '94. Average income elasticity was 1.743 during the period and found out that it was luxury goods. The result of Anova and Tobit analysis showed that the level of consumption, number of earners, age and education had positive effect on kyongjobi. And in Seoul area, house owner, male(head of the household), and professionals spent more on kyongjobi than other. The present problems of custom, spending of kyongjobi, were discussed and the change of the custom was urged.

• KIEE International Transactions on Power Engineering
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• v.5A no.3
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• pp.280-285
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• 2005

This paper proposes a novel method for determining the kind and rating of power quality solutions. To determine the kind of solution, event cause and direction are utilized. According to the event cause and direction, an adequate type of solution is determined for effective compensation. To rate the required capacity of solution, the concept of lost energy is adopted. Lost voltage, lost power and lost energy are calculated and the rating of the solution is determined to compensate a specific event. The rating method that utilizes the result of stochastic diagnosis is also proposed. A power quality index such as CP95 is adopted for solution suggestion. The method developed in this paper is applied to the test system and proved to be useful for enhancing the power quality of the customer system. It can provide customers with information pertaining to what is a proper and cost-effective solution among various compensating devices.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.57 no.8
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• pp.1377-1382
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• 2008

DSTATCOM(distribution static compensator) is one of the custom power devices, and protects a distribution line from unbalanced and harmonic current caused by non-linear and unbalanced loads. Researches about DSTATCOM are mainly divided two parts, one is the calculation of compensation current and the other part is the current control. Conventional researches use a LPF(low pass filter) to eliminate ripple component at the calculation of compensation current. But this method has a problem that LPF's characteristics restrict the compensation performance of instantaneous active and reactive power. This paper proposes a calculation of compensation current using state observer that can be a counterproposal of conventional methods using LPF. Improved performance of instantaneous active and reactive power compensation was shown by experiments.

• Proceedings of the Korea Information Processing Society Conference
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• 2014.11a
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• pp.53-56
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• 2014

Application specific instruction-set processor (ASIP) is a suitable design choice for system designers who seek both flexibility to handle various applications in the domain together with the performance. Successful development of an ASIP, however, requires a software development kit (SDK) to be provided along with the processor. Synopsys Processor Designer is an ASIP development tool, which takes as input a set of files written in a high-level architecture description language called LISA (Language for Instruction Set Architecture), and generates SDK as well as RTL. Recently, they have added support for the generation of LLVM compiler backend, though some manual work is required. In this paper, we introduce some details in porting LLVM compiler to a custom processor architecture in Synopsys Processor Designer.

• Journal of Institute of Convergence Technology
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• v.3 no.2
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• pp.45-49
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• 2013

Instant custom embroidered souvenir manufacturing system was studied. Recently customers want to get individually specialized souvenir. We present a modular manufacturing system and implementation of image processing, conversion of punching data. The manufacturing system consist of main module, photographing module and U/I module. We can change the system easily through modularization. Image Processing was necessary for making punching data. We developed sketch typed image processing and image processing which used brightness. Brightness type is suitable for instant embroidered souvenir. This study showed that fusion of embroidery technology and image processing technology can make a new business successfully.